#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
#include <vector>
using namespace std;

class Solution {
public:
    int minPathSum(vector<vector<int>>& grid) {
        int m = grid.size(), n = grid[0].size();
        vector<vector<int>> dp(m + 1, vector<int>(n + 1, INT_MAX));

        dp[1][0] = dp[0][1] = 0;
        for (int i = 1; i <= m; ++i)
        {
            for (int j = 1; j <= n; ++j)
            {
                dp[i][j] = min(dp[i - 1][j], dp[i][j - 1]) + grid[i - 1][j - 1];
            }
        }
        return dp[m][n];
    }
};

class Solution {
public:
    int calculateMinimumHP(vector<vector<int>>& dungeon) {
        int m = dungeon.size(), n = dungeon[0].size();
        vector<vector<int>> dp(m + 1, vector<int>(n + 1, INT_MAX));

        dp[m - 1][n] = dp[m][n - 1] = 1;

        for (int i = m - 1; i >= 0; --i)
        {
            for (int j = n - 1; j >= 0; --j)
            {
                dp[i][j] = min(dp[i + 1][j], dp[i][j + 1]) - dungeon[i][j];
                dp[i][j] = max(1, dp[i][j]);
            }
        }

        return dp[0][0];
    }
};